The Hydro Flask 16oz Wide Mouth Flex Sip Mug helps you enjoy your morning coffee hot or cold. The stainless steel material is durable and lightweight and features their TempShield double wall vacuum insulation which prevents heat exchange. The powder coated finish adds color pop and grip to prevent slipping. On top, the Flex Sip BPA-free plastic lid prevents spilling and heat loss. This item has a lifetime warranty from Hydroflask.